The Wealth of Nations by Part 4 Chapter 1 Page 63

That it has hitherto increased them so little is probably owing to the restraints which it everywhere labours under.

I thought it necessary, though at the hazard of being tedious, to examine at full length this popular notion that wealth consists in money, or in gold and silver. Money in common language, as I have already observed, frequently signifies wealth, and this ambiguity of expression has rendered this popular notion so familiar to us that even they who are convinced of its absurdity are very apt to forget their own principles, and in the course of their reasonings to take it for granted as a certain and undeniable truth.

Some of the best English writers upon commerce set out with observing that the wealth of a country consists, not in its gold and silver only, but in its lands,